Control word timeout

What does 17 mean?

This warning/alarm indicates a loss of communication with the frequency converter. It becomes active when parameter 8-04 Control Word Timeout Function is not set to [0] Off. If configured to [2] Stop and [26] Trip, the frequency converter will ramp down and then trip into an alarm state, indicating a critical communication failure.

• Loss of communication signal (e.g., Profibus, EtherNet/IP) from the master controller to the frequency converter.
• Incorrect setting of parameter 8-04 Control Word Timeout Function, enabling detection of communication loss.
• Physical cable break or poor connection in the communication bus wiring (e.g., RJ45 connector, M12 connector).
• Master controller (PLC/DCS) stopped transmitting the control word or experienced an internal fault.
• Communication module hardware failure on the frequency converter or master controller.

Click steps to track your progress.

1. 1

   Verify the status of the master controller (PLC/DCS) program execution and communication diagnostics.

2. 2

   Check the status indicator LEDs on the frequency converter's communication module for communication activity and errors.

3. 3

   Inspect the communication cable connections at both the frequency converter and the master controller for proper seating and damage.

4. 4

   Measure continuity of communication cable pairs (e.g., EtherNet/IP RX/TX pairs) using a cable tester.

5. 5

   Confirm parameter 8-04 Control Word Timeout Function is set to the desired value (e.g., [2] Stop or [1] Freeze output) for the application.

6. 6

   If using a fieldbus, verify the network configuration (e.g., IP address, node ID, baud rate) matches the master controller settings.